Power distribution type differential pressure control module

Abstract

The utility model provides a power distribution type differential pressure control module which comprises a module shell and an air pipe, the interior of the module shell is divided into an upper layer and a lower layer through a partition plate, the upper layer is provided with a ventilation assembly, the lower layer is provided with a display control assembly, and the display control assembly comprises a pointer type differential pressure gauge, a control panel and a power supply device. The module shell is provided with a window for exposing the pointer type differential pressure gauge and the control panel, one end of the air pipe is plugged, the other end of the air pipe is communicated with the front face or the back face of the module shell and corresponds to the ventilation assembly in position, the plugged end of the air pipe and the face, away from the air pipe, of the module shell are provided with ventilation holes, and the ventilation holes correspond to the ventilation assembly in a front-back mode. The ventilation assembly comprises a high-efficiency filter, an air purifier and a fan set which are arranged in the air flow direction. The device is low in manufacturing cost, short in manufacturing period, simple in structure, convenient to maintain and capable of being widely applied to rooms where the negative pressure environment needs to be maintained to avoid pollutant leakage.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure difference control, in particular to a power distributed pressure difference control module. Background Art

[0002] Rooms such as wards and laboratories where pollutants or harmful gases are generated need to maintain a negative pressure environment to prevent the leakage of pollutants. Medical staff operating rooms and sanitary product storage rooms need to maintain a positive pressure environment to avoid infection. Ventilation systems are usually used to achieve negative pressure in such rooms. Currently, commonly used ventilation systems are divided into power centralized ventilation systems and power distributed ventilation systems, such as Figure 1 and Figure 2 As shown in the figure, the power centralized ventilation system controls the terminal air volume by adjusting the air valve. Adjusting the air volume of one branch will affect the air volume of other branches. The room pressure is difficult to adjust and there is valve loss. The power distributed ventilation system controls the terminal air volume by adjusting the speed of the terminal fan. The room pressure adjustment is fast and accurate. Both system forms require the layout of air ducts and a special machine room to place the unit. For hospital and laboratory buildings, there are many buffer rooms in the positive and negative pressure areas and the area of ​​a single room is small. For some emergency cabin rooms, such as cabin negative pressure wards, cabin laboratories, and cabin nuclear medicine testing rooms, the use of these two systems has problems such as cumbersome system construction, high construction cost, long construction time, and troublesome maintenance. A simpler and more effective pressure difference control solution is needed. Utility Model Content

[0003] In view of the problems existing in the above-mentioned prior art, the utility model aims to provide a simple and efficient power distributed pressure difference control module for use in rooms that need to maintain a negative pressure environment to prevent the leakage of pollutants.

[0004] In order to achieve the above-mentioned purpose, the utility model proposes a power distributed pressure difference control module, including a module housing and an air duct, the interior of the module housing is divided into an upper and lower layer by a partition plate, wherein the upper layer is provided with a ventilation component, and the lower layer is provided with a display and control component, the display and control component includes a pointer-type differential pressure gauge, a control panel and a power supply device, the module housing is provided with a window for the pointer-type differential pressure gauge and the control panel to be exposed, one end of the air duct is blocked, and the other end is connected to the front or back of the module housing and corresponds to the position of the ventilation component, ventilation holes are provided on the blocked end of the air duct and on the side of the module housing away from the air duct, each of the ventilation holes corresponds to the front and back of the ventilation component, and the ventilation component includes a high-efficiency filter, an air purifier and a fan unit arranged according to the wind flow direction.

[0005] In the above scheme: it also includes an installation sleeve, which is outermost on the air duct, and one end of the installation sleeve close to the module shell is provided with a flange extension, and a plurality of screw holes are circumferentially provided on the flange extension, and reinforcing ribs are provided between the flange extension and the outer circle of the installation sleeve.

[0006] The module is installed as follows: a hole matching the size of the air duct is punched on the wall, ceiling or door, the air duct of the module is inserted into the hole from one side, the installation sleeve is tightly put on the air duct on the other side, and finally screws are driven into the screw holes of the installation sleeve to complete the fixation.

[0007] In the above scheme: the air duct is connected to the back of the module housing, the pointer-type differential pressure gauge and the control panel are exposed on the front of the module housing, the high-efficiency filter is located in front of the fan unit, and the air purifier is located between the high-efficiency filter and the fan unit. The wind can pass through the ventilation holes on the module housing, the high-efficiency filter, the air purifier, the fan unit and the air duct in sequence, and finally pass through the ventilation holes on the air duct. This structure is one of the two schemes of the module, and the user can choose the corresponding product according to which side to observe the differential pressure value as needed.

[0008] In the above scheme: the air duct is connected to the front of the module housing, the pointer-type differential pressure gauge and the control panel are exposed on the back of the module housing, the high-efficiency filter is located in front of the fan unit, and the air purifier is located between the high-efficiency filter and the fan unit. The wind can pass through the ventilation holes on the air duct, the air duct, the high-efficiency filter, the air purifier and the fan unit in sequence, and finally pass through the ventilation holes on the module housing. This structure is one of the two schemes of the module, and the user can choose the corresponding product according to which side to observe the differential pressure value as needed.

[0009] In the above scheme: the inner wall of the air duct is arranged with multiple circles of ultraviolet disinfection light belts, on which lamp beads are arranged in sequence, a single circle of ultraviolet disinfection light belt is a group of light belts, and each group of light belts includes two light belt loops, one of which is composed of an odd number of lamp beads on the ultraviolet disinfection light belt connected in series, and the other light belt loop is composed of an even number of lamp beads on the ultraviolet disinfection light belt connected in series; the fan group is composed of a plurality of small fans arranged in an arrangement, and the small fans are DC brushless speed-regulating fans, and each small fan is equipped with a shut-off valve; the air purifier adopts a negative ion generator or a plasma generator.

[0010] The ultraviolet disinfection light strip is mainly used to disinfect the inside of the module, such as the fan unit, and the germs attached to the corresponding components. The lamp beads on different groups of light strips and different light strip loops can be turned on or off independently.

[0011] The module can automatically shut down some small fans when the air volume demand is low, which can save electricity and reduce the use time of small fans. To maintain uniform air supply, the turned-on small fans should be close to the center and distributed symmetrically. They can be switched after running for a certain period of time to avoid long-term continuous operation of the same small fan affecting its service life.

[0012] In the above scheme: the pointer-type differential pressure gauge is electrically connected to the control panel, and the control panel is electrically connected to the ultraviolet disinfection light strip and the fan unit respectively; the air purifier, the fan unit, the control panel, the ultraviolet disinfection light strip and the pointer-type differential pressure gauge are all powered by the power supply device, that is, the external power supply of the power supply device is used to power the entire device, and the control panel can control the number and wind speed of small fans in the fan unit according to the measurement value fed back by the pointer-type differential pressure gauge, and can also control the number of group light strips in the ultraviolet disinfection light strip to be turned on and which light strip loop to turn on.

[0013] The beneficial effects of the utility model are:

[0014] The air enters the module from the ventilation holes and flows out from the ventilation holes on the other side. In this process, the high-efficiency filter can efficiently filter the air passing through, and can filter out dust and some germs. The air purifier can effectively disinfect germs in the air. The pointer-type differential pressure gauge can display the actual measured value of the pressure difference, which is convenient for personnel to observe whether the room pressure difference reaches the set range when passing through the buffer room. The air volume of the fan unit can be adjusted according to the measured pressure difference value so that the measured pressure difference value reaches the pressure difference setting range. Compared with the traditional ventilation system, the utility model has low manufacturing cost, short manufacturing cycle, simple structure, and convenient maintenance. It can be widely used in rooms that need to maintain a negative pressure environment to prevent pollutants from leaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a plan view of a power centralized ventilation system.

[0016] Figure 2 It is a plan view of the power distributed ventilation system.

[0017] Figure 3 This is a front view of the ventilation hole side of the module housing.

[0018] Figure 4 This is a front view of one side of the vent on the air duct.

[0019] Figure 5 It is a cross-sectional view of a structural form of the utility model.

[0020] Figure 6 It is a cross-sectional view of another structural form of the utility model.

[0021] Figure 7 It is a front view of the installation sleeve.

[0022] Figure 8 is a side view of the mounting sleeve.

[0023] Fig. 9 It is an installation elevation drawing for controlling room pressure.

[0024] Fig.10It is an installation elevation drawing for controlling the pressure difference between adjacent rooms. DETAILED DESCRIPTION

[0025] like Figure 3 As shown in FIG. 10 , a power distributed pressure difference control module is mainly composed of a module housing 1 and an air duct 2. The interior of the module housing 1 is divided into two layers, an upper layer and an lower layer, by a partition plate. The upper layer is provided with a ventilation component, and the lower layer is provided with a display and control component.

[0026] The display and control assembly includes a pointer-type differential pressure gauge 3, a control panel 4 and a power supply device 5; a window is provided on the module housing 1 for the pointer-type differential pressure gauge 3 and the control panel 4 to be exposed; one end of the air duct 2 is blocked, and the other end is connected to the front or back of the module housing 1 and corresponds to the position of the ventilation assembly. Ventilation holes 6 are provided on the blocked end of the air duct 2 and on the side of the module housing 1 away from the air duct, and each ventilation hole 6 corresponds to the front and back of the ventilation assembly.

[0027] The ventilation assembly includes a high efficiency filter 7, an air purifier (not shown) and a fan unit 8 arranged according to the wind flow direction.

[0028] The power distributed pressure difference control module also includes a mounting sleeve 9, which is mounted on the air duct 2. The mounting sleeve 9 is provided with a flanged extension at one end close to the module housing 1, and a plurality of screw holes 92 are provided on the flanged extension along the circumference, and a reinforcing rib 91 is provided between the flanged extension and the outer circle of the mounting sleeve 9.

[0029] The module is installed as follows: a hole matching the size of the air duct is punched on the wall, ceiling or door, the air duct 2 of the module is inserted into the hole from one side, the installation sleeve 9 is tightly sleeved on the air duct 2 on the other side, and finally screws are driven into the screw holes 92 of the installation sleeve 9 to complete the fixation.

[0030] One structural form of the power distributed differential pressure control module is: the air duct 2 is connected to the back of the module housing 1, the pointer differential pressure gauge 3 and the control panel 4 are exposed on the front of the module housing 1, the high-efficiency filter 7 is located in front of the fan unit 8, and the air purifier is located between the high-efficiency filter 7 and the fan unit 8. The wind energy passes through the ventilation holes 6 on the module housing 1, the high-efficiency filter 7, the air purifier, the fan unit 8 and the air duct 2 in sequence, and finally passes through the ventilation holes 6 on the air duct 2. This structure is one of the two schemes of the module, and the user can choose the corresponding product according to which side to observe the differential pressure value as needed.

[0031] Another structural form of the power distributed differential pressure control module is: the air duct 2 is connected to the front of the module housing 1, the pointer differential pressure gauge 3 and the control panel 4 are exposed on the back of the module housing 1, the high-efficiency filter 7 is located in front of the fan unit 8, and the air purifier is located between the high-efficiency filter 7 and the fan unit 8. The wind energy passes through the ventilation hole 6 on the air duct 2, the air duct 2, the high-efficiency filter 7, the air purifier and the fan unit 8 in sequence, and finally passes through the ventilation hole 6 on the module housing 1. This structure is one of the two schemes of the module, and the user can choose the corresponding product according to which side to observe the differential pressure value as needed.

[0032] Preferably, the inner wall of the air duct 2 is arranged with multiple circles of ultraviolet disinfection light belts 10, on which lamp beads are arranged in sequence, and a single circle of ultraviolet disinfection light belt 10 is a group light belt, and each group light belt includes two light belt loops, one of which is composed of an odd number of lamp beads in series within the range of the corresponding group light belt on the ultraviolet disinfection light belt, and the other light belt loop is composed of an even number of lamp beads in series within the range of the corresponding group light belt on the ultraviolet disinfection light belt. The ultraviolet disinfection lamp 10 is mainly used to disinfect the inside of the module, such as disinfecting the fan unit 8, etc., and disinfecting the germs attached to the corresponding components. The lamp beads on different groups of light belts and different light belt loops can be turned on or off independently.

[0033] The fan group 8 is composed of a plurality of small fans arranged in an array. The small fans are DC brushless speed-regulating fans, and each small fan is equipped with a shut-off valve. The module can automatically shut down some small fans when the air volume demand is low, which can save power consumption and reduce the use time of the small fans. To maintain the uniformity of air supply, the small fans that are turned on should be close to the center and distributed symmetrically. They can be switched after running for a certain period of time to avoid the same small fan from running continuously for a long time and affecting its service life.

[0034] Air purifiers use negative ion generators or plasma generators.

[0035] Preferably, the pointer-type differential pressure gauge 3 is electrically connected to the control panel 4, and the control panel 4 is electrically connected to the ultraviolet disinfection light strip 10 and the fan group 8 respectively; the air purifier, the fan group 8, the control panel 4, the ultraviolet disinfection light strip 10 and the pointer-type differential pressure gauge 3 are all powered by the power supply device 5, that is, the external power supply of the power supply device 5 is used to power the entire device, and the control panel 4 can control the number and wind speed of the small fans in the fan group 8 according to the measurement value fed back by the pointer-type differential pressure gauge 3, and can also control the number of light strips in the ultraviolet disinfection light strip 10 and which light strip loop to open.

[0036] The application method of the utility model is:

[0037] The power distributed pressure difference control module is installed between the room and the outdoors to connect the indoor and outdoor areas, and the indoor air is discharged to the outdoors after filtering and disinfection, so as to control the negative pressure in the room to reach the set range; or the power distributed pressure difference control module is installed between two rooms to connect the two rooms, and the air in one room is discharged to another room after filtering and disinfection, so as to control the pressure difference in adjacent rooms to reach the set range.

[0038] Application 1: Taking the negative pressure control of the contaminated room with a buffer room as an example, a two-power distributed pressure difference control module is used, one module is used for exhausting the contaminated room to the outside, and the other module is used for exhausting the buffer room to the contaminated room, so that the airflow flows from the buffer room to the contaminated room. When the module is running, the negative pressure control value of the contaminated room and the pressure difference between the contaminated room and the buffer room are preset, and then the module for exhausting the contaminated room to the outside is turned on. The module adjusts the air volume of the fan unit 8 according to the pressure detection value of the pointer-type differential pressure gauge 3 to achieve the negative pressure in the contaminated room, and then the module between the two rooms is turned on. The module adjusts the air volume of the fan unit 8 according to the pressure detection value of the pointer-type differential pressure gauge 3 to achieve the pressure difference between the contaminated room and the buffer room, so that the negative pressure in the contaminated room and the pressure difference between the contaminated room and the buffer room both reach the set value.

[0039] Application 2: Taking the negative pressure control of a contaminated room with a buffer room as an example, two power distributed differential pressure control modules are used, one module is used to exhaust air from the contaminated room, and the other module is used to exhaust air from the buffer room. When the modules are running, the control negative pressure value of each room is preset, and each module adjusts the air volume of the fan unit 8 according to the pressure detection value of the pointer differential pressure gauge 3, so that the negative pressure value of each room reaches its own set value.

[0040] In Application 1 and Application 2, the specific process of the module adjusting the air volume 8 of the fan group according to the pressure detection value of the pointer-type differential pressure gauge 3 is as follows: the two pressure measuring hoses 31 of the pointer-type differential pressure gauge 3 are respectively connected to the two side spaces to measure the pressure difference between the two, and the pressure difference is directly displayed on the pointer-type differential pressure gauge 3 and transmitted to the control panel 4 through the communication interface; the control panel 4 is equipped with an intelligent controller, which can adjust the number and speed of small fans in the fan group 8 to adjust the air volume according to the measured pressure difference, so that the measured pressure difference reaches the pressure difference control range.

[0041] The control panel 4 can set the pressure difference control range and compare and display the set range and the actual measured value, so that personnel can compare and confirm whether the pressure difference meets the control requirements.

[0042] The control panel 4 is connected to an audible and visual alarm. When the air volume of the module reaches the maximum and the pressure difference still does not reach the set range, the audible and visual alarm sounds an alarm, indicating that the room is not sealed enough and needs to be improved.

[0043] When the air volume of the power distributed pressure difference control module is less than 1 / 2 of the rated air volume, only part (specifically 1 / 2) of the group light strips are turned on; when the air volume of the power distributed pressure difference control module is ≥ 1 / 2 of the rated air volume, all groups of light strips are turned on; when all the small fans on the fan group 8 are turned off, all groups of light strips are turned off. When only part of the group of light strips is turned on, the two light strip loops on the same group of light strips are switched on at a timed interval; the two light strip loops on the same group of light strips have the function of timed switching to avoid a light strip loop being turned on for a long time, which affects the service life of the lamp beads.

Claims

1. A power distributed pressure difference control module, comprising a module housing (1) and an air duct (2), characterized in that: The interior of the module housing (1) is divided into an upper and lower layer by a partition plate, wherein the upper layer is provided with a ventilation component, and the lower layer is provided with a display and control component, wherein the display and control component comprises a pointer-type differential pressure gauge (3), a control panel (4) and a power supply device (5), and the module housing (1) is provided with a window for the pointer-type differential pressure gauge (3) and the control panel (4) to be exposed, one end of the air duct (2) is blocked, and the other end is connected to the front or back of the module housing (1) and corresponds to the position of the ventilation component, and ventilation holes (6) are provided on the blocked end of the air duct (2) and on the side of the module housing (1) away from the air duct, and each of the ventilation holes (6) corresponds to the front and rear of the ventilation component, and the ventilation component comprises a high-efficiency filter (7), an air purifier and a fan unit (8) arranged according to the wind flow direction.

2. The power distributed pressure difference control module according to claim 1, characterized in that: It also includes a mounting sleeve (9), the mounting sleeve (9) being mounted on the air duct (2), and an end of the mounting sleeve (9) close to the module housing (1) is provided with a flanged extension, a plurality of screw holes (92) are provided on the flanged extension along the circumference, and a reinforcing rib (91) is provided between the flanged extension and the outer circle of the mounting sleeve (9).

3. The power distributed pressure difference control module according to claim 1, characterized in that: The air duct (2) is connected to the back of the module housing (1), the pointer-type differential pressure gauge (3) and the control panel (4) are exposed on the front of the module housing (1), the high-efficiency filter (7) is located in front of the fan unit (8), and the air purifier is located between the high-efficiency filter (7) and the fan unit (8). The air flow can sequentially pass through the ventilation holes (6) on the module housing (1), the high-efficiency filter (7), the air purifier, the fan unit (8) and the air duct (2), and finally pass through the ventilation holes (6) on the air duct (2).

4. The power distributed pressure difference control module according to claim 1, characterized in that: The air duct (2) is connected to the front of the module housing (1); the pointer-type differential pressure gauge (3) and the control panel (4) are exposed on the back of the module housing (1); the high-efficiency filter (7) is located in front of the fan unit (8); the air purifier is located between the high-efficiency filter (7) and the fan unit (8); the air flow can sequentially pass through the ventilation hole (6) on the air duct (2), the air duct (2), the high-efficiency filter (7), the air purifier and the fan unit (8), and finally pass through the ventilation hole (6) on the module housing (1).

5. The power distributed pressure difference control module according to claim 1, characterized in that: The inner wall of the air duct (2) is arranged with a plurality of circles of ultraviolet disinfection light belts (10), on which lamp beads are arranged in sequence, a single circle of ultraviolet disinfection light belt (10) is a group of light belts, and each group of light belts includes two light belt loops, one of which is composed of an odd number of lamp beads on the ultraviolet disinfection light belt connected in series, and the other light belt loop is composed of an even number of lamp beads on the ultraviolet disinfection light belt connected in series; the fan group (8) is composed of a plurality of small fans arranged in an array, the small fans are DC brushless speed-regulating fans, and each small fan is equipped with a shut-off valve; the air purifier adopts a negative ion generator or a plasma generator.

6. The power distributed pressure difference control module according to claim 5, characterized in that: The pointer-type differential pressure gauge (3) is electrically connected to the control panel (4), and the control panel (4) is electrically connected to the ultraviolet disinfection light strip (10) and the fan unit (8) respectively; the air purifier, the fan unit (8), the control panel (4), the ultraviolet disinfection light strip (10) and the pointer-type differential pressure gauge (3) are all powered by the power supply device (5).

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